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May 29, 2020 18:55
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Swift code to use raw Grand Central Dispatch to make requests
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import Foundation | |
var todos = [String: Any]() | |
let dispatchGroup = DispatchGroup() | |
for todo in 0..10 { | |
let url = URL(string: "https://jsonplaceholder.typicode.com/todos/\(todo)") | |
dispatchGroup.enter() | |
let task = URLSession.shared.dataTask(with: url!) { (data, response, error) in | |
let jsonSerialized = try! JSONSerialization.jsonObject(with: data, options: []) as? [String : Any] | |
todos += [jsonSerialized] | |
// do more stuff | |
// ready to end processing on this particular async task? | |
dispatchGroup.leave() | |
} | |
task.resume() | |
} | |
dispatchGroup.notify(queue: DispatchQueue.main) { | |
print("Got \(todos.count) todos!") | |
// other stuff including display on screen | |
} |
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